God stirred up animosity between Abimelek and the citizens of Shechem so that they acted treacherously against Abimelek.
References for Judges 9:23
God did this in order that the crime against Jerub-Baal’s seventy sons, the shedding of their blood, might be avenged on their brother Abimelek and on the citizens of Shechem, who had helped him murder his brothers.
References for Judges 9:24
In opposition to him these citizens of Shechem set men on the hilltops to ambush and rob everyone who passed by, and this was reported to Abimelek.